<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card class="box-card">
      <!--搜索与添加区域-->
      <el-row :gutter="20">
        <el-col :span="9">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="clearUserList">
            <el-button slot="append" icon="el-icon-search" @click="handleQuery"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>
      <!--用户列表区域-->
      <el-table :data="userlist" border stripe>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <!--用作用域插槽获取这一行的数据-->
          <template #default={row}>
            <!--{{row}}-->
            <el-switch v-model="row.mg_state" @change="userStateChanged(row)"></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作">
          <template #default={row}>
          <!--修改按钮-->
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(row.id)"></el-button>
          <!--删除按钮-->
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(row.id)"></el-button>
          <!--分配角色按钮-->
          <el-tooltip placement="top" content="分配角色" :enterable="false">
          <el-button type="warning" icon="el-icon-setting" @click="setRole(row)" size="mini"></el-button>
          </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!--分页区域-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>
    <!--添加用户的对话框-->
    <el-dialog title="提示" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
      <!--内容主题区域-->
      <el-form status-icon :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机号" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
        <!--底部区域-->
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addUser">确 定</el-button>
  </span>
    </el-dialog>
    <!--修改用户的对话框-->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form status-icon :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机号" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
        <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editUserInfo">确 定</el-button>
  </span>
    </el-dialog>
    <!--分配角色的对话框-->
    <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClose">
      <div>
        <p>当前的用户:{{userInfo.username}}</p>
        <p>当前的角色:{{userInfo.role_name}}</p>
        <p>分配新角色:
          <el-select v-model="selectedRoleId" placeholder="请选择新角色">
            <el-option
              v-for="item in roleslist"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data: function () {
    // 验证邮箱的规则
    const checkEmail = (rules, value, cb) => {
      const regEmail = /^[a-zA-Z0-9]+([-_.][a-zA-Z0-9]+)*@[a-zA-Z0-9]+([-_.][a-zA-Z0-9]+)*\.[a-z]{2,}$/;
      if (regEmail.test(value)) return cb();
      cb(new Error('请输入合法邮箱'));
    };
    // 验证手机号的规则
    const checkMobile = (rules, value, cb) => {
      const regMobile = /^1(3|4|5|6|7|8|9)\d{9}$/;
      if (regMobile.test(value)) return cb();
      cb(new Error('请输入合法手机号'));
    };
    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 2
      },
      // 用户列表初始值
      userlist: [],
      // 用户总数
      total: 0,
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 添加用户
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加用户的验证规则对象
      addFormRules: {
        username: [
          {
            required: true,
            message: '请输入用户名',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur'
          }
        ],
        password: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur'
          }
        ],
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机号',
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ]
      },
      // 编辑角色信息的验证规则对象
      editFormRules: {
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机号',
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 监听分配角色的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配权限的角色的用户信息
      userInfo: {},
      // 获取的角色数据列表
      roleslist: [],
      // 已选中的角色 id 值
      selectedRoleId: ''
    };
  },
  created () {
    this.getUserList();
  },
  methods: {
    async getUserList () {
      const { data: res } = await this.$http.get('users',
        { params: this.queryInfo });
      if (res.meta.status !== 200) return this.$message.error('用户列表获取失败');
      this.userlist = res.data.users;
      this.total = res.data.total;
      console.log('获取用户列表', res);
    },
    // 监听 pagesize 改变的事件
    handleSizeChange (newSize) {
      // console.log(newSize);
      this.queryInfo.pagesize = newSize;
      this.getUserList();
    },
    // 监听页码值改变的事件
    handleCurrentChange (newPage) {
      // console.log(newPage);
      this.queryInfo.pagenum = newPage;
      this.getUserList();
    },
    // 监听 switch 开关状态的改变
    async userStateChanged (userinfo) {
      // console.log(userinfo);
      const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`);
      // console.log(res);
      if (res.meta.status !== 200) {
        userinfo.mg_states = !userinfo.mg_states;
        return this.$message.error('更新用户状态失败!');
      }
      this.$message.success('更新用户状态成功!');
    },
    // 这块老师内容有 bug,如果在第十页搜索就会在第十页展示
    // 如果没有就会显示没有数据,但是其实可能在 第一页
    // 因此需要每次重置列表到第一页.
    // 查询列表清空控制
    handleQuery () {
      this.queryInfo.pagenum = 1;
      this.getUserList();
    },
    // 清空按钮点击后执行的事件
    clearUserList () {
      this.queryInfo.pagenum = 1;
      this.getUserList();
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields();
    },
    // 监听编辑用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields();
    },
    // 点击确定,添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false;
        // 发起网络请求
        const { data: res } = await this.$http.post('users', this.addForm);
        // console.log('添加新用户', res.meta.status);
        if (res.meta.status !== 201) return this.$message.error('添加新用户失败');
        this.$message.success('添加新用户成功');
        // 隐藏添加用户的对话框
        this.addDialogVisible = false;
        // 重新获取用户列表
        await this.getUserList();
      });
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      console.log('当前行', id);
      const { data: res } = await this.$http.get('users/' + id);
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败');
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 修改用户信息并提交
    editUserInfo () {
      const that = this.editForm;
      this.$refs.editFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return false;
        if (that === this.editForm) {
          this.editDialogVisible = false;
          return false;
        }
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(`users/${this.editForm.id}`, { email: this.editForm.email, mobile: this.editForm.mobile });
        if (res.meta.status !== 200) return this.$message.error('更新用户信息失败');
        // 关闭对话框
        this.editDialogVisible = false;
        // 刷新数据列表
        this.getUserList();
        // 提示修改成功
        this.$message.success('更新用户信息成功');
      });
    },
    // 根据 id 删除对应的用户信息
    async removeUserById (id) {
      // 询问用户是否确认删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除用户');
      }
      const { data: res } = await this.$http.delete(`users/${id}`);
      console.log(res);
      if (res.meta.status !== 200) return this.$message.error('删除用户失败');
      this.$message.success('删除用户成功');
      await this.getUserList();
      // console.log(id);
    },
    // 分配角色
    async setRole (userInfo) {
      this.userInfo = userInfo;
      // 获取所有角色列表
      const { data: res } = await this.$http.get('roles');
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败');
      }
      this.roleslist = res.data;
      // 展示分配角色对话框
      this.setRoleDialogVisible = true;
    },
    // 点击确定按钮分配角色
    async saveRoleInfo () {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色');
      }
      console.log(this.userInfo.id);
      console.log(this.selectedRoleId);
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectedRoleId });
      if (res.meta.status !== 200) {
        return this.$message.error('更新角色失败');
      }
      this.$message.success('更新角色成功');
      await this.getUserList();
      this.setRoleDialogVisible = false;
    },
    // 监听分配角色对话框的关闭事件
    setRoleDialogClose () {
      this.selectedRoleId = '';
      this.userInfo = {};
    }
  }
};
</script>

<style lang="less" scoped>

</style>
